建筑填充墙钢筋经无机胶粘剂加固后抗拉性能测试  

Tensile performance test of building infill walls steel bar after reinforcement with inorganic adhesive

作　　者：倪震 Ni Zhen(Nantong Electric Power Design Institute Co.,Ltd.,Nantong 226006,Jiangsu,China)

机构地区：[1]南通电力设计院有限公司,江苏南通226006

出　　处：《中国胶粘剂》2024年第1期50-56,共7页China Adhesives

摘　　要：由于建筑填充墙的结构形式和材料种类多样,经无机胶粘剂加固后,抗拉性能会发生变化。以重烧氧化镁、磷酸二氢钾、硼砂和粉煤灰为原料,制备不同配合比磷酸镁水泥(MPC)无机胶粘剂试件,测试建筑填充墙钢筋经无机胶粘剂加固后的抗拉性能。通过分析硼砂含量、氧化镁与磷酸二氢钾的物质的量之比(M/P)、粉煤灰含量对MPC无机胶粘剂抗拉强度、凝结时间的影响,确定最佳配合比。将其与玻璃纤维增强材料(GFRP)加固建筑填充墙试件,研究其抗拉性能。研究结果表明:硼砂用量为氧化镁质量的10%、M/P=5.5、粉煤灰量与氧化镁、磷酸二氢钾质量之和的比值为12%时,MPC无机胶粘剂的性能相对最佳;对建筑填充墙试件作加固处理,可有效提升其承载能力,S2试件的承载能力高于S1试件,抗拉性能更突出。Due to the variety of structural forms and material types of building infill walls,the tensile performance will change after reinforcement with inorganic adhesive.Using calcined magnesium oxide,potassium dihydrogen phosphate,borax,and fly ash as raw materials,different mixing proportions of magnesium phosphate cement(MPC)inorganic adhesive specimens were prepared to test the tensile performance of building infill walls steel bar after reinforcement with inorganic adhesive.By analyzing the effects of borax content,the ratio of magnesium oxide to potassium dihydrogen phosphate(M/P),and the content of fly ash on the tensile strength and setting time of MPC inorganic adhesive,the optimal mixing ratio was determined.It was reinforced with glass fiber reinforced material(GFRP)for building infill wall specimen,the tensile performance was then studied.The research results showed that when borax content was 10%of the mass of magnesium oxide,M/P=5.5,the ratio of the content of fly ash to the sum of the mass of magnesium oxide and potassium dihydrogen phosphate was 12%,the performance of MPC inorganic adhesive was relatively optimal.Strengthening the specimens of building infill walls could effectively enhance their load-bearing capacity.The load-bearing capacity of specimen S2 was higher than that of specimen S1,and its tensile performance was more prominent.

关 键 词：建筑填充墙 无机胶粘剂 抗拉性能 配合比 凝结时间 抗拉强度 

分 类 号：TU365[建筑科学—结构工程]